The last game of the HALO trilogy, presented by Bungie studios. It is the penultimate experience in FPS on the next-Gen console. Common side effects are:
1) walking around school/work/home and exclaiming Killing Spree, Killionaire, Killamanjaro, Overkill, and Killtacular at the slightest sense of achievement..getting an A on a test/completing a merger/making a sandwich.
2) It is also often played on LIVE by illiterate 4 year olds who constantly rape the shit out of older, more illiterate 16 or 23 year olds in the game lobby, over an argument over who's gayer. these 4 year olds should be avoided, as when they win they will constantly call you a no0b..even though you headshotted them with a pistol from the other side of Valhalla.

PRE-HALO 3:
little billy was a straight A student, turned in his work on time, always on time for school, and never fell asleep in class.
POST-HALO 3:
little billy now is a nocturnal energy drink chugging pasty white as snow trash talking FIEND that goes by an alias known only to him and other xbl affiliates.

A gift probably from heaven, programmed by god himself. Though Playstation 3 fag boys...sorry, "fanboys" may say it sucks, they are just disappointed that their console will not be able to handle it. With all it's cool features, halo 3 will make gaming history. On Sept 25th the earth itself will shake from the awesomeness of halo.